EARNINGS PER COMMON SHARE COMPUTATION (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |
|
|
|
|
| Net income available for common stockholders |
$ 450
|
$ 314
|
$ 1,015
|
$ 1,175
|
| Weighted average outstanding shares of common stock used to compute basic earnings per common share (in shares) |
149,417
|
148,889
|
149,321
|
149,617
|
| Shares used to compute diluted earnings per common share (in shares) |
150,904
|
150,466
|
150,869
|
151,321
|
| Basic earnings per common share (in dollars per share) |
$ 3.01
|
$ 2.11
|
$ 6.80
|
$ 7.85
|
| Diluted earnings per common share (in dollars per share) |
$ 2.98
|
$ 2.09
|
$ 6.73
|
$ 7.77
|
| Number of antidilutive stock options and restricted stock excluded from computation (in shares) |
658
|
320
|
873
|
451
|
| Employee Stock Options |
|
|
|
|
| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |
|
|
|
|
| Dilutive effect of employee stock options and restricted stock (in shares) |
210
|
182
|
216
|
198
|
| Restricted Stock |
|
|
|
|
| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |
|
|
|
|
| Dilutive effect of employee stock options and restricted stock (in shares) |
1,277
|
1,395
|
1,332
|
1,506
|